diff --git a/step4.c b/step4.c
index e5dad4b..f491e53 100644
--- a/step4.c
+++ b/step4.c
@@ -8,7 +8,7 @@ typedef struct {
     float score3;
 } Student;
 
-// 函数声明
+
 int compareStudents(const void *a, const void *b);
 void insertStudent(Student students[], int *size, Student newStudent);
 void printStudents(Student students[], int size);
@@ -19,10 +19,10 @@ int main() {
         {10002, 12, 77.9, 56.5, 87.5},
         {10003, 11, 92.5, 99.0, 60.5}
     };
-    int size = 3; // 当前学生数量
+    int size = 3; 
     Student newStudent;
 
-    // 输入新学生的信息
+
     printf("");
     scanf("%d",&newStudent.id);
      printf("");
@@ -33,25 +33,24 @@ int main() {
        scanf("%f",&newStudent.score2);
        printf("");
        scanf("%f",&newStudent.score3);
-    // 检查学号是否已存在
+    
     int i;
     for (i = 0; i < size; i++) {
         if (students[i].id == newStudent.id) {
-            printf("学号 %d 已存在。\n", newStudent.id);
+            printf(" %d \n", newStudent.id);
             return 0;
         }
     }
 
-    // 插入新学生
     insertStudent(students, &size, newStudent);
 
-    // 打印所有学生信息
+    
     printStudents(students, size);
 
     return 0;
 }
 
-// 比较函数，用于qsort
+
 int compareStudents(const void *a, const void *b) {
     Student *studentA = (Student *)a;
     Student *studentB = (Student *)b;
@@ -64,7 +63,7 @@ int compareStudents(const void *a, const void *b) {
     }
 }
 
-// 插入新学生
+
 void insertStudent(Student students[], int *size, Student newStudent) {
     Student temp[*size + 1];
     int i;
@@ -79,7 +78,6 @@ void insertStudent(Student students[], int *size, Student newStudent) {
     (*size)++;
 }
 
-// 打印学生信息
 void printStudents(Student students[], int size) {
 	int i;
     for (i = 0; i < size; i++) {